<title>Got Ya</title>
<head>
<script language="JavaScript">
</script>
</head>
<body bgcolor="#ffffcc">
<hr>
<center>
<h1>Got Ya</h1>
</center>
<hr>
<ul>
<li><a href="#num1">== and =</a>
<li><a href="#num1">if</a>
</ul>

<a name=num1>
<hr>
An error which almost every C programmer has made is shown below:
<pre>
	main()
	{
	   int left=10;
	   		
	   if ( left = 5 )
	   {
	      puts(" Values are equal...");
	   }
        }
</pre>
The program assigns 5 to the variable <b>left</b> and returns 5.
This is interpreted as <a href="../CONCEPT/true_false.html">TRUE</a> and causes the 
<a href="../FUNCTIONS/puts.html">puts</a> statement to be executed everytime.
<p>
Here is the corrected program.
<pre>
	main()
	{
	   int left=10;
	   		
	   if ( left == 5 )		/* Double equals required. */
	   {
	      puts(" Values are equal...");
	   }
        }
</pre>

<hr>

<hr>
<h2>See Also:</h2>

<img src="../../GRAPHICS/whiteball.gif">
<a href="idioms.html">Coding idioms</a>.<p>

<p>

<hr>
<p>
<center>
<table border=2 width="80%" bgcolor="ivory">
<tr align=center>
<td width="25%">
<a href="../cref.html">                  Top</a>
</td><td width="25%">
<a href="../master_index.html">          Master Index</a>
</td><td width="25%">
<a href="keywords.html">                 Keywords</a>
</td><td width="25%">
<a href="../FUNCTIONS/funcref.htm">      Functions</a>
</td>
</tr>
</table>
</center>
<p>
<hr>
<address><a href="../../address.html">Martin Leslie</a> 
</address><p>
</body>
</html>
